Wireless telephone.



M TBNTED MAY 26, 190s. F. J. MUGARTY, DBGD. v

H. A. MCGARTY, ADMINISTRATOR.

WIRELESS TELEPHONE. APPLIOMION FILED 1120.12. 1904.

- piece opens.

nuire sgmrRANcIs J. MCoA'eTY, or sAN riniucrsco, cALiroeNiA; HENRY A. MCcAn'rv, .innixisrni- Ton or sion rnANcis J. MCCARTY, DncEAsEn, AssiGNoe ro Mccnnrv ivmrirnss 'renn- .PHONE co., or SAN rmNcrsco, CALIFORNIA, A CORPORATION or ciiiiroisrm.

wrnnmss TELEPHONE.

NQ. eeepeif Specification ci Lettere Patent;

Patented 'May 26, 1908.

Application filed December 12, 19%. Serial No. 23S,.

To oli whom it'may concern:

Be it known that l, FRANCIS J. MCCARTY, citizen of the United States, residing et the city and county of Sen .Francisco and State,

of California, have invented new and usefui lm rovements in Wireless Telephones, of which the foliowing isA e specification.

This invention relates to improvements in Wireless 'telephone systems and apparatus therefor by meansoi which telephonie messages may be transmitted without the eid of wires or other mechanical intermediate connections between the stations.

The invention consists in t combination of devices whereby vibrations produced by voca-l sounds in the apparatus are capable of transmission through the medium surrounding the eorth without the eid ci Wires or similer connections.

The invention is hereafter described with reference to the accompanying drawings, in

which-the Figure is n diagrzunmatic View` of the transmitting appnratus.

A is a mouth-piece with the usuel or zuiy suitable diaphragm extended within it end 2 is e tube into the side of which the mouth At one end of this tube is the microphone transmitter es et 3, and et the opposlte end of the tube is enother transmitter diaphragm 4.

5 represents on induction coil having two primary Wimlings of wires 6 and '7, and in conjunction with these en insulated secondary winding es et 8. The iirst primary wire 6 1S connected through n. branch of the wire G, and a binding post 9 1 with the contact screw or point 10, which is adjustable in the non-Conducting case within which the diuphrogm 4 is lixed, mid this diaphragm has thefconttct l-l corresponding with the routaut l0. The conforts may hc of platinum. llrom the binding? )ost the wire ha passes into the coil l5' tiene@ passing out of it through wirr G connecte with thev buttery l2, und thence to the binding post lll ol the transmitter r-i.

li is it condenser interposed between the binding-post i) mid thcv primar)Y wire (i, :md it servos to prevent sparking :it ilux contacts ol' the trmismittor.

The microphouf,` trmismittcr f h-.is the binding-posts lil-mid 16 with which tho omis of the second primary wirdl ere connected with e. resistance interposed es' et '17.

in the operation of .the device, words Spoken into the mout-h piece will cause uy vibration oi both the diaphragm 4 und that within the transmitter 3, and the vibration of the micro hone trensmiiter being synchronous Wit the vibrations oi tho din.-y phregm 4, the effect producedoy the doubie prinutry 4Winding of the coil .5 is transmitted through the secondary Winding S emi rho discharge points i8 to the aerial conductor ink-the line shown by the errow 1S? und thence to any suiteble receiver.

I have ascertained that any primary oi" mi induction coil which has e. second loyer f wire Wound over it serves to choke oli` the eiiect of current in the 'first primary upon. the secondary, if it be suddcniy shorbcircuitcd and that by connecting en ordinary microphone transmitter across the ends of this second primary, it will vary' the ell'ects oi the iirsnprimery upon the secondary when thc mouth piece is spoken iiito, without tho :iid of @battery when used over short distances, but to obtain this efl'ect over ioneT distances l usually employ it few buttery elements.

Having thus described my invention, what lr cleini and desire to secure h); Lettere Potent is- Y 1. in e Wireless telephone, meonfi'or in.4 tensifying the vibrations from n transmitting device, mid moons? consisting' oi o tr munit-v ting diaphragm with metallic (fruitoripoints, sin opposed microphone lriuismiten mixinduction coil including two priumry, und n. seeondery winding, one oi seid rv windings lacing .connected with actuated in unison, means whereby a spark is reduced, and the' aerial transmitting medium is aected to transmit articulate speech, and a mechanism capable ofreceiving transmitted speech. Y

(i. In a telephone, means introduced into the primary circuit, said means comprising a plurality of rimary windings whereby a 'secondary coi is energized, a mouth piece, a transmitting diaphragm with metallic con- 2.0i tacts and a microphone transmitter actuated 1in unison means whereby a spark is produced, and the aerial transmitting medium is affected to transmit articulate speech, and a receiving mechanism capable oi receiving :transmitted speech. v

' 5. ln a wireless telephone, means for intensifying'the vibrations between a primary telephone transmitter and the aerial transmission device, said means comprising `a chamber with which the mouth-piece is con 'nected, amicrophone transmitter and a transmittin diaphra m connected tlierewith, an in uction coi with double primary windings connected.` respectively with the transmitters, and a secondary circuit ener gized thereby connected with the aerial wire, and having a spark gap, and a battery, are- -jsistance, ind a condenser in the primary circuits. l

6. In a Wireless telephone, a mouthpiece, a transmitting diaphragm, a battery, an inductionl coil with two primary windings, Wires qonn'ecting one of said windings and the diaphragm, a microphone transmitter,-

4'5. connections between said transmitter and the other primary winding, and a secondary coil with a spark-gap and aerial/mid ground connections,

7. In a wireless telephone, Ia mouthpiece, 50 a transmitting diaphragm with metallic contacts, an induction coil and battery and ecnnections with the transmitter, a microphone transmitter actuated in unison with the first named transmitter, a second primary windl ing of the induction coil connected -with the senesi microphone transmitter, and a resistance interpescdv between said transmitter and the connected primary winding of the coil.

8. ln a wireless telephone, a mouth-piece, a transmitting diaphragm, a battery, an induction coil, wires connecting the coil and transmitter, a microphone transmitter, means whereby it is actuated in unison with the first named transmitter, a second primary winding of the induction coil, said second winding being connected with the microphone transmitter, and a condenser interposed between the local battery and the rst transmitter.

9. In an apparatus of the character described, a chamber, a microphone transmitter, a transmitting diaphragm at op osite sides, a mouth-piece connecting with t e intermediate portion of the chamber, a coil composed of primary windings, one of which is connected with the microphone transmitter' and the other with the diaphra m, coacting contacts one of which is carrie by the diaphragm, and a secondarycoil with spark gap and aerial connections.

il). In an apparatus of the character described, a chamber or case with microphone transmitter, a transmitting diaphragm and mouth-piece, a coil composed of double primary windings, and a secondary Windi'n with spark gap and aerial connections, sai( primaries being connected respectively with the microphone and with the transmitterI diaphragm, co-acting contacts one of which is carried by the diaphragm, and a battery and resistance within the primary circuit.

l1. In an apparatus of the character described, a microphone transmit-ter, a mouthpiece, and a transmitting diaphragm, a contact point carried by the diaphragm, a fixed contact with which the diaphragm contact co-acts, a coil consisting of double primary windings, one of which connects with the iXed ccntact, and the other with the microphone transmitter, a secondary coil with spark gap and aerial wires, and a battery resista-nce and condenser 'in the primary circircuits.

In testimony whereof lhave hereunto set my hand in presence of two subscribing witnesses. l

FRANCIS J. MUCARTY.

Witnesses:

S. H. Nocnsn, HENRY l. TiiicoU. 

